"""
Copyright (c) 2022 Huawei Technologies Co.,Ltd.

openGauss is licensed under Mulan PSL v2.
You can use this software according to the terms and conditions of the Mulan PSL v2.
You may obtain a copy of Mulan PSL v2 at:

          http://license.coscl.org.cn/MulanPSL2

THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
See the Mulan PSL v2 for more details.
"""
"""
Case Type   : DMS分布式锁
Case Name   : 主备倒换(swithchover)，备机持有S锁
Create At   : 2023/4/20
Owner       : opentestcase033
Description :
    1.创建测试表
    2.备节点开启事务A执行select，不提交
    3.备机执行 switchover 升主
    4.恢复主备关系
    5.清理环境
Expect:
    1.成功
    2.成功，获取X锁
    3.升主成功，X锁释放
    4.成功
    5.成功
History     :
"""

import os
import time
import unittest

from yat.test import macro
from testcase.utils.Logger import Logger
from testcase.utils.CommonSH import CommonSH
from testcase.utils.Constant import Constant
from testcase.utils.ComThread import ComThread


class DmsOck(unittest.TestCase):

    def setUp(self):
        self.log = Logger()
        self.log.info(f'-----{os.path.basename(__file__)} start-----')
        self.pri_sh = CommonSH('PrimaryDbUser')
        self.std_sh = CommonSH('Standby1DbUser')
        self.constant = Constant()
        self.table = 't_dms_ock_0065'

    def test_dms_ock(self):
        text1 = '-----step1:创建测试表;expect:执行成功-----'
        self.log.info(text1)
        create_tb = f"drop table if exists {self.table} cascade;" \
                    f"create table {self.table}(" \
                    f"id int, name varchar, source number) with(segment=on);" \
                    f"insert into {self.table} values (1,'haha',92)"
        create_res = self.pri_sh.execut_db_sql(create_tb)
        self.log.info(create_res)
        self.assertTrue(self.constant.CREATE_TABLE_SUCCESS in create_res
                        and self.constant.INSERT_SUCCESS_MSG in create_res,
                        f"执行失败:{text1}")

        text2 = '-----step2:备节点开启事务A执行select，不提交;expect:成功-----'
        self.log.info(text2)
        sql_a = f'''begin;
        select * from {self.table};
        select pg_sleep(5)'''
        session1 = ComThread(self.std_sh.execut_db_sql, args=(sql_a,))
        session1.setDaemon(True)
        session1.start()
        time.sleep(0.5)

        text3 = '-----step3:备机执行 switchover 升主;expect:成功-----'
        self.log.info(text3)
        switchover_res = self.std_sh.exec_cm_ctl('switchover', '-n 2',
                                                 f'-D {macro.DB_INSTANCE_PATH}')
        self.log.info(switchover_res)
        self.assertIn('switchover successfully', switchover_res,
                      f"switchover失败:{text3}")
        status = self.std_sh.exec_cm_ctl('query', '-Cvidp')
        self.log.info(status)
        sql_res = self.std_sh.execut_db_sql(
            f"select locktype,relation,mode from pg_locks, pg_class "
            f"where relation = oid and relname = '{self.table}';")
        self.log.info(sql_res)
        self.assertIn('0 rows', sql_res, f"执行失败{text3}")

        session1.join(10)
        res_a = session1.get_result()
        self.log.info(f'session1_results: {res_a}')
        self.assertIn('1 | haha |     92', res_a, f"执行失败:{text2}")
        self.assertIn('terminating connection due to administrator command',
                      res_a, f"执行失败:{text2}")

    def tearDown(self):
        text4 = '-----step4:恢复主备关系;expect:成功-----'
        self.log.info(text4)
        res = self.pri_sh.exec_cm_ctl('switchover', '-a')
        self.log.info(res)
        self.assertIn('cm_ctl: switchover successfully.', res, f"执行失败:{text4}")

        text5 = '-----step5:清理环境 expect:成功-----'
        self.log.info(text5)
        drop_tb_res = self.pri_sh.execut_db_sql(
            f"drop table if exists {self.table} cascade;")
        self.log.info(drop_tb_res)
        self.assertIn(self.constant.DROP_TABLE_SUCCESS,
                      drop_tb_res, f"删表失败:{text5}")
        self.log.info(f'-----{os.path.basename(__file__)} end-----')
